solution- a combination in where one matter dissolves into another. vein- a slim channel/slab of a mineral that is very different from the rocks around it.
Outline
Processes that form minerals
minerals can form through two ways
crystallization of melted materials
crystallization of materials dissolved in water
Minerals from Magma
when magma stays under surface
cools down slowly
slow cooling means big crystals
Magma closer to the surface forms smaller crystals
has less time to cool- less time to form crystals
Minerals from hot water solutions
hot water solution cools, elements/ compounds leave solution
underground, hot water solutions and metals often follow cracks in a rock
the metals crystallize into veins that look like streaks of chocolate and vanilla ice cream
Minerals formed by evaporation
thick deposits of halite formed over millions of years
ancient seas evaporated slowly
Where minerals are found
earth's crust is made up of common rock- forming minerals
also combined in different types of rocks
most valuable minerals are in/near eareas with volcanic activity or mountain building
example : gold deposidtes were found along Sierra Nevada mountains----
Table of Contents
4.2 How Minerals Form
Vocabulary
solution- a combination in where one matter dissolves into another.
vein- a slim channel/slab of a mineral that is very different from the rocks around it.
Outline
Diagram- Minerals from Hot Water Solutions